Abstract:
ABSTRACT: NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions in the Gulf of Mexico. These integrated bathymetric-topographic DEMs were developed for NOAA Coastal Survey Development Laboratory (CSDL) through the American Recovery and Reinvestment Act (ARRA) of 2009 to evaluate the utility of the Vertical Datum ... Transformation tool (VDatum), developed jointly by NOAA's Office of Coast Survey (OCS), National Geodetic Survey (NGS), and Center for Operational Oceanographic Products and Services (CO-OPS). Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. Coastal Services Center (CSC), the U.S. Office of Coast Survey (OCS), the U.S. Army Corps of Engineers (USACE), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of North American Vertical Datum of 1988 (NAVD 88), Mean High Water (MHW) or Mean Lower Low Water (MLLW) and horizontal datum of North American Datum of 1983 (NAD 83). Cell size ranges from 1/3 arc-second (~10 meters) to 1 arc-second (~30 meters). The NOAA VDatum DEM Project was funded by the American Recovery and Reinvestment Act (ARRA) of 2009 (http://www.recovery.gov/).
CURRENTNESS REFERENCE: ground condition
SPATIAL DATA ORGANIZATION INFORMATION Direct Spatial Reference: Raster Raster Object Type: Grid Cell Row Count: 20701 Column Count: 9901 Vertical Count: 1
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL Horizontal Datum Name: D_North_American_1983 Ellipsoid Name: GRS_80 Semi-major Axis: 6378137.0000 Denominator of Flattening Ratio: 298.257223563
NATIVE: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000
Purpose:
PURPOSE: Developed for the Office of Coast Survey (OCS), NOAA Coastal Survey Development Laboratory (CSDL) in support of NOAA's Vertical Datum Transformation tool (VDatum).
Description:
NGDC, an office of NOAA, developed two bathymetric-topographic DEMs of Mobile, AL, New Orleans, LA, and Panama City, FL. The DEMs were developed for NOAA's CSDL through the ARRA of 2009 to evaluate the utility of VDatum, developed jointly by NOAA's OCS, NGS, and CO-OPS (http://vdatum.noaa.gov/).
